BACKGROUND:In palatorrhaphy, iodoform gauzes are often used to fill the bilateral relaxation incisions and cover the wound. However, there are a series of postoperative complications, such as fever, loss of appetite, foreign body sensation, secondary bleeding. In order to avoid or reduce the complications after palatorrhaphy, the use of gelatin sponge to fill bilateral relaxation incisions has achieved good clinical results.OBJECTIVE:To compare the clinical effects of different treatments on wound healing after palatorrhaphy.METHODS:110 child patients with cleft palate were selected and assigned into two groups according to admission time. Fifty-four patients who admitted from January 2013 to December 2015 (experimental group) were obturated with gelatin sponge, while the other 56 patients who admitted from January 2008 to December 2012 (control group) were obturated with idoform gauze. The postoperative results of patients were assessed in various aspects, including psychological impact, diet, body temperature, bleeding, and wound healing. The incision scar width was measured at 4 weeks postoperatively.@RESULTS AND CONCLUSION: (1) Patients in the experimental group experienced shorter recovery time than those in the control group (P < 0.05). (2) Patients in the experimental group had substantialy lower incidence of fever postoperatively, and shorter duration of fever than those in the control group (P < 0.05). (3) In comparison to the control group, the experimental group showed less postoperative complications such as bleeding and vomiting (P < 0.05). (4) The incision scar width in the experimental group was significantly narrower than that in the control group (P < 0.05) after 4 weeks. These experimental findings demonstrate the superior effect of gelatin sponge over iodoform gauze and its value in clinical application with better healing, less bleeding, shorter recovery time and no impact on eating.

Objective:To observe the effects of sonicated extract of Porphyromonas endodontalis(P.endodontalis)on the cell cy-cle and apoptosis of human osteoblastic hFOB 1 .1 9 cells.Methods:hFOB 1 .1 9 cells were treated with sonicated extract of P.end-odontalis at 0 (the control),1 ,1 0 and 1 00 μg/ml for 1 2,24 and 48 h respectively.MTT assay was used to examine cell prolifera-tion.The cell cycle distribution and apoptosis were examined by flow cytometry.Results:The sonicated exact of P.endodontalis in-hibited the proliferation of hFOB 1 .1 9 cells in a time-and dose-dependent manner.24 h treatment of 1 0 μg/ml and 1 00 μg/ml ex-act arrested the cell cycle of the cells in G1 phase,48 h treatment induced apoptosis in a dose-dependent manner.Conclusion:Sonicated exact of P.endodontalis may arrest hFOB 1 .1 9 cells in G1 phase and induce cell apoptosis,leading to inhibition of the cell proliferation.

BACKGROUND:The autologous oxygen-delivering biomimetic nanoscaffold is composited with chondrocytes in simulated microgravity to construct the active tissue-engineered bone, which not only has excel ent osteogenic potential characteristics, but also has autologous releasing oxygen, and additional y can effectively prevent early transplant failure caused by sufficient revascularization and hypoxia. OBJECTIVE:To investigate the effects of autologous oxygen-delivering biomimetic nanoscaffold composited with chondrocytes on repairing different types of temporomandibular joint condylar fractures. METHODS:Total y 30 Sprague-Dawley rats were randomly divided into control group, experimental groups 1 and 2 (n=10 per group). The autologous oxygen-delivering nano-hydroxyapatite/chitosan scaffold composited with chondrocytes were transplanted into rats with temporomandibular joint condylar longitudinal fracture in the experimental group 1 and those with temporomandibular joint condylar transverse fracture in the experimental group 2, respectively. At 1, 3 and 6 weeks after transplantation, the number of proliferating cel nuclear antigen-positive cel s was detected by immunofluorescence assay;the chondrocyte apoptosis was detected using TUNEL method, and expressions of col agen type II, Sox9 and vascular endothelial growth factor were observed by RT-PCR technology. RESULTS AND CONCLUSION:The number of proliferating cel nuclear antigen-positive cel s in the experimental groups 1 and 2 were significantly higher than that in the control group at different time points after transplantation (P<0.05). At 3 and 6 weeks after transplantation, the number of apoptotic chondrocytes in the experimental groups 1 and 2 was significantly lower than that in the control group (P<0.05);significantly higher and highest expressions of col agen type II, Sox9 and vascular endothelial growth factor were found in the experimental groups 2 and 1 compared with the control group, respectively (P<0.05). Additional y, compared with the experimental group 2, the number of proliferating cel nuclear antigen-positive cel s was significantly lower in the experimental group 1 at 3 and 6 weeks after transplantation (P<0.05);the number of apoptotic chondrocytes was significantly lower in the experimental group 1 at 3 weeks after transplantation (P<0.05). These results indicate that autologous oxygen-delivering biomimetic nanoscaffold composited with chondrocytes to repair different types of temporomandibular joint condylar fractures presents some different outcomes.